1.  >>  国家开放大学 / 安装工程估价
 国家开放大学 / 安装工程估价

当通风空调风管密封要求较高或板材较厚不能用咬口连接时,板材的连接常采用( )。


a.
焊接

b.
咬口连接

c.
铆钉连接

d.
螺、栓连接
  积分
 参考答案:
 佳题速递:
  • 65、以下关于计算机病毒的叙述,正确的是_______。 A.计算机病毒是一段程序,它是程序设计者由于考虑不周而造成的错误程序 B.计算机病毒能够扩散,但不会传染给已感染过这种病毒的计算机 C.计算机病毒是由计算机系统运行混乱造成的 D.计算机病毒是可以预防和消除的计算机统考
  • 开环控制的数控机床, 通常使用()为伺服执行机构。数控加工技术
  • 产品的可回收性设计属于下列哪项研究领域。A.全面质量管理B.绿色制造C.反求工程D.虚拟加工先进制造技术
  • 15、No one knows who made the first ice cream. Some people think that water ices and milk ices may have been made by the Chinese between three thousand and four thousand years ago. In time, the dish reached India. The Indians, in turn, may have passed on the secret to the Arabs and Persians. The Persians called their dish Sharbat, from which our word sherbet(冰冻果子露)comes. Marco Polo, an Italian who traveled widely in the thirteenth century, noted that he found the Chinese had long been making ices out of fruit juices and milk. From the fourteenth century on, ices became popular, first in Venice and then throughout Italy. In 1533, when Catherine de Medicis left Italy to marry the future King Henry Ⅱof France, she took her cooks with her. They made desserts the French had never tasted before. Among them was "ice cream". For each day of the wedding festivities(庆祝活动,庆典) Catherine's cooks prepared a different flavor of her favorite dessert-"ice cream." At first ice cream was a luxury(奢侈品) in France. Only rich people had money to buy it. Then, in 1660, a young man from Sicily, Francisco Procopio, arrived in Paris. He opened a shop that sold ice cream at prices people could afford. Procopio's"ice-cream parlor(店堂)" became so popular that other shops were opened. About 1640, King Charles I introduced ice cream to England. He had heard it was popular in Italy and France. He served ice cream for dessert at a banquet(宴会). The surprise dish was a great success. The King ordered his cook to keep the recipe(制作方法) for ice cream a secret. Charles felt that only royalty(王室) should serve the dessert. But the secret soon leaked out. Ice cream quickly became popular in England too.统考英语阅读理解
  • 51. 护士为病人插胃管出现呛咳、发绀时应 A、 A. 立即拔除胃管 B、 B. 嘱病人深呼吸 C、 C. 指导病人作吞咽动作 D、 D. 稍停片刻再插 E、 E. 继续插管基础护理学
  • 确定中国共产党对军队的绝对领导的是A、三湾改编B、秋收起义C、广州起义D、南昌起义中国近现代史纲要